50693-74-8Relevant articles and documents
Synthetic Transformations of Sesquiterpene Lactones. 11.* Conjugates Based on Caffeine and Eudesmanolides with N-Containing Linkers
Reshetnikov,Patrushev,Shults
, p. 855 - 860 (2020/09/21)
8-(Aminoalkylamino)caffeine or 8-(piperazinyl)caffeine were formed in high yields by reacting 8-bromo- or 8-chlorocaffeine with linear and cyclic diamines using microwave-assisted organic synthesis. These amines were highly reactive in Michael reactions with sesquiterpene lactones containing active methylene groups. Conjugates with caffeine and eudesmanolide moieties bonded by a N-containing linker were synthesized.
Synthesis of 8-substituted xanthines and their oxidative skeleton rearrangement to 1-oxo-2,4,7,9-tetraazaspiro[4,5]dec-2-ene-6,8,10-triones
Zimmer, Hans,Amer, Adel,Baumann, Frank M.,Haecker, Michael,Hess, Christopher G. M.,Ho, Douglas,Huber, Hans J.,Koch, Klaus,Mahnke,Schumacher, Christian,Wingfield, Robert C.
, p. 2419 - 2428 (2007/10/03)
The synthesis of a number of 8-(dialkylamino)- and 8-alkoxyxanthines (3 and 6, respectively) is described. Treatment of 3 with m-chloroperoxybenzoic acid (m-CPBA) gave by a novel rearrangement 3-(disubstituted amino)-4,7,9- trimethyl-1-oxo-2,4,7,9-tetraaz